Two questions:

What 19 or 20 tire size?

How much - camber?

Thinking of going to 10 from my 9.5's, thanks

What is this another skull cru impossibility? Someones gotta be running 10" +40's.

i have 10" +40s but they arent mounted yet. ive been told to get a 275-30-20 rear tire

I'm definitely getting it aligned once they're on...but I don't think the camber should be a big enough issue to require a camber kit...I do know that you'll def. need to roll your fenders if you don't want them to rub though.

I was thinking I might have to go with a more narrow width & taller sidewall to curve it in under the fender, I'm already fender rolled on 9.5 +35's & 255/40/19 with no issues but was thinking 265's for the 10's might be better clearance with my 1" drop.

hm im not sure about a drop....im not dropped yet. most people i talked to on this site who have the same rims as me (s55) went with the setup i recommended.

lots of sedan owners are running 10" wide rears with +40mm ET because of the sevas wheels...they are wrapped with 275/30/20...